Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan lap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - canh trinh vat thong cong dan ((phan cau) OR (phan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - canh trinh vat thong cong dan ((phan cau) OR (phan tu))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - canh trinh vat thong cong dan ((phan cau) OR (phan tu))*.